<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>grid---真等高</title>
  <style>
    .box {
      display: grid;
      grid-template-columns: 100px auto;
      grid-template-areas: "left right";
    }
    .left {
      grid-area: left;
      min-height: 200px;
      background: darkcyan;
    }
    .right {
      grid-area: right;
      background: bisque;
    }
  </style>
</head>
<body>
<div class="box">
  <div class="left">
    left:设置最低高度为200px
  </div>
  <div class="right">
    right
  </div>
</div>
</body>
</html>